BACKGROUND:More recently, stem cel therapy has become an issue of concern. Exogenous neural stem cel transplantation brings new hope for the treatment of nervous system injury by self-replication and differentiation to complement and replace damaged or dead nerve cels.
OBJECTIVE:To explore the therapeutic efficacy of neural stem cel transplantation on Alzheimer’s disease.
METHODS:Thirty APP/PS1 mice with Alzheimer’s disease were randomly assigned into model group, cel solution transplantation group or cel transplantation group (n=10 per group). Another 10 C57BL/6 mice were selected as controls. Embryos of C57BL/6 mice at 18 embryonic days were taken to make neural stem cel suspension folowed by transfection using lentiviral vectors carrying GFP gene at different multiplicities of infection (1, 5, 10, 15, 20). Afterwards, GFP-transfected neural stem cels were implanted into the hippocampus of Alzheimer’s disease mice in the cel transplantation group, while the same volume of complete medium was injected into the hippocampus of mice in the cel solution transplantation group. Morris water maze test was performed at 2 weeks after cel transplantation, and brain tissues of mice was taken and detected histologicaly at 4 weeks after cel transplantation.
RESULTS AND CONCLUSION: Compared with the control group, the escape latency was significantly higher, and the number of crossings over the target quadrant was lower in the other three groups (P < 0.05). Compared with the cel solution transplantation and model groups, in contrast, the escape latency was significantly lower, and the number of crossings over the target quadrant was significantly higher in the cel transplantation group (P < 0.05). Four weeks after transplantation, more intact neurons were found in the cel transplantation group as compared with the model group. These findings indicate that neural stem cel transplantation can improve behavior and morphology performance of mice with Alzheimer’s disease.

Neonatal hyperbilirubinemia is one of the major causes of neonatal hospitalization,which is common in the early stage of the newborn and is characterized by skin and sclera yellow staining.The levels of serum total bilirubin and unconjugated bilirubin increased greatly in children,which may damage the brain function,kidney function,hearing and heart function of the newborn,even cause death.Research has found that hyperbilirubinemia can damage the brain nerve,hearing,kidney and heart of the newborn.The damage degree of target organs is positively related to serum bilirubin level.This article reviews the adverse effects of hyperbilirubinemia on newborns.

Objectives To investigate the specific site for measuring inferior alveolar nerve canal (IANC) by cone beam computed tomography (CBCT),and to provide reference data of the course of the IANC of the crowd.Methods This study was a retrospective data analysis.One hundred and thirty CBCT cases were measured and compared after classification by gender and age (65 men and 65 women,65 middle age and 65 youth).Since the proximal center of the mental foramen area,the cross-section at which the mental hole just completely breaks the buccal cortical bone was defined as S1,and S2,S3,S4 were defined as cross-sections with 1-cm apart from each other since S1.L1,L2,L3,and L4 were measured as the distance from specific sites on the outer wall of the IANC to the alveolar crest,the outer wall of lingual lateral cortical bone,the mandibular minimum margin,and the outer wall of buccal cortical bone.The results were analyzed using independent samples t test,with P＜0.05 being considered statistically significant.Results On the right IANC S2L1,S3L1,S4L1,S2L2,S3L2,S4L2,S1L3,S3L4,the 8 groups of L values measured on these 8 sites,all showed differences between genders (P＜0.05).So did the 10 groups of L values measured on the left IANC S1L1,S2L1,S3L1,S4L1,S1L2,S3L2,S4L2,S2L3,S3L3,S4L4 (P＜0.05).The middle age group and the youth group were statistically different for the data measured on the right IANC S2L4 (P＜0.05).This was the same case for the data measured on the left IANC S1L3.When classified according to gender,L1 in the S1 to S4 sections firstly increased and then decreased,and eventually decreased.The change pattern of L3 was opposite to that of L1.L2 in the S1 to S4 sections firstly decreased and then decreased,and eventually increased.The change pattern of L4 was opposite to that of L2.When the samples were classified according to age,the change pattern L value in the S1 to S4 sections was the same as that under gender classification.Conclusions The effect of gender on the L value of individuals is relatively great,while the effect of age on the L value of individuals value is very small.Setting the corresponding long axis of mandible as a reference,the change pattern of IANC in the mandible can be deduced based on the change of L value from S 1 to S4:from S1 to S4,the course of IANC on the vertical direction is firstly downward,tben turns to upward and goes upward;from S1 to S4,the trend of IANC on the horizontal direction is firstly toward the side of tongue,and eventually turns towards the buccal side.The current study provides reference data for IANC-related anatomy from the mandibular foramen to the mandibular second molars.

Objective To study astragalus polysaccharide′s synergistic enhancement on Carvedilol′s improvement effects on dilated cardiomyopathy′s heart function.Methods SD rat model of dilated cardiomyopathy was established and divided into CON group (no treatment),CAR group (only Carvedilol treatment),APS group (only astragalus polysaccharide treatment) and C+A group (Carvedilol and astragalus polysaccharide treatment) according to their treatment methods.The left ventricular ejection fraction (LVEF),Tei index,high sensitive C reactive protein (hs-CRP),tumor necrosis factor (TNF)-α,interleukin (IL)-1,IL-6,IL-8,CD3+,CD4+ and CD8+ T lymphocyte subsets in four groups were detected and compared.Results The LVEF in C+A group and CAR group were significantly higher than those in CON group and APS group respectively (P<0.05,respectively),while Tei index in C+A group and CAR group were significantly lower than those in CON group and APS group respectively (P<0.05,respectively).The LVEF in C+A group was significantly higher than that in CAR group (P<0.05),while Tei index in C+A group was significantly lower than that in CAR group (P<0.05).The hs-CRP,TNF-α,IL-1,IL-6 and IL-8 in C+A group and APS group were significantly lower than those in CON group and CAR group respectively (P<0.05,respectively),while CD3+,CD4+ and CD8+ T lymphocyte subsets in C+A group and APS group were significantly higher than those in CON group and CAR group respectively (P<0.05,respectively).The hs-CRP,TNF-α,IL-1,IL-6 and IL-8 in C+A group were significantly lower than those in APS group respectively (P<0.05,respectively),while CD3+,CD4+ and CD8+ T lymphocyte subsets in C+A group were significantly higher than those in APS group respectively (P<0.05,respectively).Conclusion Astragalus polysaccharide has significant synergistic enhancement on Carvedilol′s improvement effects on dilated cardiomyopathy′s heart function,which may be related to the enhancement of T lymphocyte immunity and the decreasing of inflammatory reaction.

Objective To explore the risk factors for in stent stenosis (ISR) in coronary artery disease in elderly patients undergoing postoperative percutaneous coronary intervention (PCI).Methods We chose 418 cases undergoing PCI in our hospital.There were 263 males and 156 females,aged from 60 to 79 years,average (71.3--8.9)years in this study.Under the same conditions of treatment strategies,we collected all possible risk factors for ISR in patients undergoing postoperative PCI,and statistics were analyzed.Results All patients were rechecked at 1 year after PCI.104 cases (24.9％) occurred ISR,and 314 cases (75.1％) were diagnosed without ISR.Multiple logistic analysis showed that,and sex had little effect on ISR incidence (P＞0.05).Body mass index(OR=9.54,95％CI:6.542～32.154,P=0.002),smoking history(OR=26.01,95％CI:5.532～122.238,P=0.000),hypertension(OR=15.72,95％CI:3.240～76.026,P=0.001),diabetes mellitus(OR=11.98,95％CI2.667～53.835,P=0.001),history of high cholesterol(OR=8.98,8,95％CI2.164～37.283,P=0.003),exercise time (OR 5.63,8,95 ％ CI2.004 ～ 25.385,P=0.013)had positive correlations with ISR incidence.Conclusions Effective control of risk factors including smoking,hypertension,diabetes,high cholesterol,proper exercise,and weight control can help prevent the development of ISR in elderly patients with postoperative PCI.

Objective To investigate the value of interleukin-6 (IL-6) level as a prognostic indicator in diabetic ketoacidosis (DKA) patients.Methods Data of 88 cases of DKA in Sir Run Run Shaw Hospital collected from June 1,2010 to December 31,2012 were analyzed prospectively.They were divided into two groups according to the survival of patients followed up for 28 days:non-survival group (n =12) and survival group (n =76).Serum levels of IL-6,lactate,base excess and APACHE Ⅱ score in 24 hours after admission were compared between two groups by independent t test.The receiver operating characteristic (ROC) curve was plotted to analyze the performance of IL-6 as a prognostic indicator in the early stage of DKA.Correlations between IL-6 value and lactate,base excess,APACHE Ⅱ score were analyzed.Results The IL-6 values were elevated obviously in non-survival group.The ROC of IL-6 had an area under curve (AUC) of 0.783,and the cut-off value of IL-6 for the death followed up for 28 days was 448.9 ng/L.In all patients,IL-6 values and APACHE Ⅱ score showed a positive correlation between them (r =0.919,P =0.005),and also positive correlations existed between IL-6 and lactate as well as base excess (r=0.922,P=0.003; r=0.887,P=0.015)in24 hours.Conclusions IL-6 value is a reliable prognostic indicator in the early stage of DKA.

Objective To investigate the relationship between the expression of FAS/FASL and spermatogenesis in the contralateral testis after unilateral testicular torsion in puberty Sprague-Dawley rats. Methods Five groups of side testicular torsion adolescence SD rats model were established as follows:group A as control group, group B for testicular torsion group,group C for testicular torsion plus methylprednisolone group, D for reverse side testes excision group, and Group E testes excision plus methylprednisolone group for reverse side. SD rats were treated with testicular resection and/or injection of methylprednisolone after torsion for 24 h. The rats were executed at postoperative 1 month, and contralateral testes were collected for histopathological examination. Expression of FAS and FASL was analyzed quantitatively by immunohistochemistry with a computer pathological image analysis system. Each rat was evaluated with regard to endocrine parameters (follicle-stimulating hormone (FSH), luteinizing hormone ( LH) and testosterone ( T) by radioimmunoassay. Results Histopathological examination of the contralateral testes showed that either orchiectomy or orchiectomy plus methylprednisolone was more successful than no treatment. Fas/FasL protein in both control group and 4 experimental groups were expressed. B group showed more expression of FAS and FASL than that of the other groups. FSH, LH and T were normal in all cases. Conclusion Unilateral testicular torsion in puberty SD rats may result in higher expression of FAS and FASL, and accelerate germ cell apoptosis and subfertility. Methylprednisolone may decrease the expression of FAS and FASL and maintain spermatogenesis in the contralateral testis after the unilateral testicular torsion.

Objective To analyze the sequence of the novel conjugative plasmid pO157_Sal detected in outbreak isolates of Escherichia coli O157∶H7 .Methods The traE genes of the outbreak isolates in China were amplified by polymerase chain reaction (PCR) and the products were sequenced .The TraE sequences of Escherichia coli O157 ∶ H7 strains from other sources were retrieved from GenBank . Phylogenetic tree based on the TraE sequences was constructed by Neibhor-joining analysis .The whole plasmid sequences of pO157_Sal and pEC4115 were compared .Results The sequences of traE gene were identical among the Chinese isolates . There were homologous sequences of TraE in Escherichia coli O157∶H7 isolates from different sources .Twenty-one out of the 52 pO157_Sal genes were homologous to genes of pEC4115 with amino acid level identity ranging from 28% to 51% .Conclusions Although similar TraE sequences and similar plasmid are found in Escherichia coli O157∶H7 isolates from different sources ,pO157_Sal is only observed in Chinese outbreak isolates .The TraE sequences are conservative among the outbreak isolates ,indicating they are from the same specific source .

Thrombelastography (TEG) is an image presenting the viscoelasticity changes of blood clot in the process of blood clotting,consequently reflecting the ability of blood clotting and fibrinolysis.TEG is increasingly used in the field of guiding intraoperative blood transfusion,monitoring the Blood coagulation function,treating trauma patient,and monitoring the blood coagulation and fibrinolytic function of a variety of diseases,due to its rapid and accurate results.We discuss the clinical applications progress of TEG in this article.

BACKGROUND: In vivo animal experiments have found that magnesium al oy stents can be completely degraded in a slow, orderly and non-toxic manner fol owing the vascular remodeling. OBJECTIVE: To investigate the applied effect and biocompatibility of a new type of magnesium al oy stent in blood vessels. METHODS: Forty-two crossbreed dogs were implanted with absorbable magnesium al oy stents via the coronary artery or left femoral artery. At days 1, 3, 5 and weeks 1, 2, 3, 4 after implantation, coronary or femoral artery angiography, inflammatory factor detection and morphological analysis targeting intimal hyperplasia were performed. RESULTS AND CONCLUSION: At 1 day after implantation, the stents had the complete shape and were ful y extended; at 3 days after implantation, the stents were degraded partial y; at 1 week after implantation, the stents were degraded completely. Within 1-3 weeks after implantation, the levels of tumor necrosis factor α, interleukin-6 and interleukin-8 continued to decrease. At 2 and 3 weeks after implantation, the target vessels presented with mild intimal hyperplasia. As time went on, the hyperplasia area increased gradual y, and the percentage of intimal hyperplasia increased gradual y. Blood magnesium concentration remained unchanged before and after stent implantation. The results show that the new absorbable magnesium al oy stent can be completely degraded within 1 week after stent implantation and has good biocompatibility.